Apparatus for dressing the edges of the upper leather in the manufacture of shoes



Aug. 1, 1950 v. BATA ETAL 2,517,277

APPARATUS FOR DRESSING THE EDGES OF THE UPPER LEATHER IN THE MANUFACTURE OF SHOES Filed Jan. 20, 1948 INVENTORS y um ATTORNEYS.

l/kizadziy Patented Aug. 1 1 950 APPARATUS FOR DRESSING THE specs OF THE UPPER LEATHER IN THE MANUFAC- TUBE F SHOES Vi ktor Bat-a and Adolf Vitek, Zlin Czechoslo v-akia, assignors to Bata, narodni podnik, Zlin,

Czechoslovakia Application January 20, 1948, Serial No. 3,206

In Czechoslovakia J anuary 20, 1947 i 9 Claims.

The present invention relates to the manufacture of shoes, more particularly to an apparatus for dressing the edges of the upper leather of shoes, especially of shoes which have been tacked by means of nails, small claspsor like fastening means. Heretofore such dressing operation has been carried out by knocking or hammering. The invention is concerned more specifically with the dressing of the toe part of shoes.

In the usual tacking of a shoe toe part on a tacking machine, the stretched upper leather is bent over the edge of a last and that of the inner sole together with the toe cap and the lining, the upper leather being scored by means of a knife in its portion of maximum bend, so as to permit better folding of the material and in this bentover and folded position the upper leather is fastened to the inner sole, by means of nails. During such a tacking operation so much materialis accumulated especiallyin the portions of maximum bend, that in view, of the next operation to be effected on the shoe, that is securing the sole, it is necessary to distribute evenly the accumulated material or to eliminate the accumulation, and moreover it is necessary to improve the border of the shoe which has been formed in the portions where the upper has been bent over the inner sole and to smooth the creases formed at the edges of the upper due to the folding of the material. According to former proposals, all those imperfectionsin tacking have been eliminated on hammering or knocking machines, both of the handoperated and the automatic types, which by the effect of im-paetsproduced by hammering rings mounted on a rotating drum draw the material additionally'over the edge of the inner sole so as to eliminate the creases, make the border sharper and smooth the material unduly accumulated at the bend of the shoe toe part. In many cases it becomes even 1 necessary to remove the accumulated material by cutting off the same. The hammering on a hand operated hammering machine is one of the most difficult operations in the manufacture of shoes. The eifort may be reduced to a certain extent by the use of a hammering machine in which the shoe is automatically held and fed to the hammering drum, but such a machine does not comply fully with the requirements of modern production because it represents the main source of noise in a shoemakers shop.

An object of the apparatus in accordance with the present invention is to eliminate the toil connected with,and the noise of the hammering operation while obtaining a cleanand sharp edge onthe shoe, an appropriate final stretching of the material and a distribution and pressing of all the unduly accumulated material.

The essence of the inventionconsists in this carrying out the above method comprises a two,

part mould, the parts ofthe latter being slidable relatively to each other, and a heel support which forces the tacked shoebetween the mould parts. Preferably both mould parts are heated so that the pressing operation, is effected in heated condition whereby partial ironing of the material takes place.

the hammering operation Moreover the scratch ing or removing the surplus. material in any other manner and thus any depreciation ofthe material are completelyavoided. l

Inadditionto the ease and noiselessness of the operation and the high quality of the work, another advantage consists in this that the op:- eration may be effected by unskilled persons, the products are all uniformly pressed, wherebytheir fastening to the sole is made easier, and-last but not leastthe output is increased.

Further advantages and features of the pres-e,

ent invention will appear from the following description when read in connection with the ac-,

companying drawings, in which:

Fig. 1 shows diagrammatically a two pair stag I ,,tion in elevation; 3 w Q Fig. 2 is a side elevation of a station in its initial position; and W Fig. 3 is a side elevation of a station in its operative position.

With reference to the drawings, a base plate I is providedhavingsecured thereon two casings 2, 2 for the the left and right press mould, respectively. Each mould comprises afixed lower part 3 and a slidable upper part 4, the latter being held in the casing 2 by means of screws,

i B and nuts 5. The screws 6 are screwed into the upper mould part 4 and pass through longitudinal slots 1 in the casing 2., The slidable upper part 4 of the mould has a cavity 8 corresponding in shape to that of the shoe toe part, While the fixed mould part 3 hasa recess 9 correspondingto the Such ironing has been, eflfected heretofore by hand upon completion, of

underside of the shoe. In the recess 9 a number of grooves l are formed being directed towards the axis of the last (Fig. l); the object of the grooves is to draw the material under treatment towards th'evaxis of the last. Afheating "element H is mounted =inthe= body of the .lowerlmouldr.

part 3 and serves for heating the mould,

Another important element of the arrangement is the heel support IZIWhiChiS provided with the removable washer l3.

The heel support l2 and the slidable upper mould part 4 are operated e. g., by meansof a hand lever l4 fastened on a shaft"l5"which' is Fast on 'theshaft mounted on the base plate I; I5 is a fork [-6 which by means of a pin l! is connected to a link l8 freely rotatable about .a; pin. 19.

2| secured on the base plate I. are suspended two links 22 having their opposite ends mounted on a pin 23 carried by the heel support #2. In addition the heersupport l2 =is pivoted to a pin"2d-to which it isconnected by a" lever v25, also through the intermediary ofthe pivot pin 23; plate 1.

lower ends pass freely over'a-pin-zaand are provided with nuts 29? The pin ZB-is freely rotatable" in a'sleeve 3ll'fastened to theleverZ 51 The press ing "movement of the upper "mould part "4 "is de-- rived directly from thehee'lsupport' IZbymeansofthe shoe 3i which is inserted into theu'nould' inia manner to be disclosed'hereinafter:

The "apparatus so far described fie operated in the following manner:

In the position'shownin Fig.5 1 the left'mould is" under pressure and the right mould is in its initialposition which is shownalso in 2;" The operator'inserts loosely a last 33 :carrying' the tacked'shoe into the cavity 3 "ofthe 'slidable upper A mould part dice-foremost, the heel support being" sufficiently remote. from 'the'heel of the'last; as shown in Fig. 2, as'not'to"bein"the' waygof the last. The hand lever'l 4 is in its elevated position,

andthe operator; while retaining theshoe 'by' his left'han'd in-the" mould cavity; draws 'by'his right hand thelever' M down in the direction S11, This movement causes the lever 'ifi-toswing in' the direction S2, .and'throughtheeffect of the-link H] the pin iii-on the levers Zll-"is raised about the pin 2| in the directionsa. During'th'e'upward'movement ofthe pin 19 the 1inks22"-are' moving up and-entrain the jheelsupport l2which with its washer l3comes' to bear firmly against the heel of the shoe '3! 'andthus-first'forces the shoe into the cavity 8 of the projectinguppen mould part 4, as shownin'Fig. 2; anditherrbegins to force the upper mouldypart'into'the" interior *ofth'e casingz. During this movement the lower toe part is caused to engagelinto the recess .Slof the fixed mould part3'f with simul tanecus forming, smoothing and pressing of the. At'this stagelthe,

tacked toepart of the upper. grooves In aid in giving, the .pressed material a.

correct final stretch towards the axisofithe last.

The end-position of the lever system and of-the mouldand shoe upon terminationof the pressing operationis shown. in Fig.-; 3. Theishoe is re tai-nedinthis. position withirithe' heated mould until. the operator-has .changed the shoe. inothe.

adjacent mould, The last mentioned-.mould,

4 which up to this moment has occupied the position shown in Fig. 3, is returned by movement of the lever M in counterclockwise direction to its initial position shown in Fig. 2, the reverse pivotal movement of the heel support I 2=about the pin 24 causing .ith'eipin 28 to bear. against :the nuts 29 and to withdraw by means of the links \26 the mould part 4 from the casing 2. In this manner the shoepisreleased', and when all the parts have been-.lreturnedlto the position shown in Fig. 2, the operator removes the shoe from the machine and inserts a fresh .shoe in place thereof. Thus the operations proceedalternately in the adjacent moulds:

The pin [9 is supported rotatablygby' two. levers which are mounted pivotably on .a pin. From the 'pinlll pressed material;

It should be .notedthat during the final pressingin. the mouldany nails, clasps or the like, whichstillarenot completely driven in the inner sole, are forced into the latter so that the shoe removed from the press mould has its pressed part perfectly smooth. The operation of the machine is quite-noiseless; even 'if the hand driveczis 'replaced by-a hydraulicor other. motor .drive; This? latter arrangement is also comprised lwithimth'e scope'of the=present invention;

What we claim is:

1. An apparatus-for dressing-the edges of: the: upper leather in the-manufacture of shoes; coma prising a two part mould having: itstpartsiareranged slidably relative-to each other, andzaheeli v support adaptedto force atacked shoe between the two mould. parts;

21 An apparatus for dressingthe edges .of the r; upper lather in: the manufacture Iof shoes, com; prising a two part mould of which' the-lower part1:

adapted to engage the tacked portionofthe shoe;

is fixed "while the upper mould part is...slidable5in-;= a" guide, and a hee1:supportfadaptedtoiforcera. tacked shoe between thetwo-mould parts.

3. An apparatus for dressing the edges: of :the 2 -upper leather in the manufacture. of shoes, .com+ 4 prising a fixed lower mouldpart adaptedito: en.- gagethe tacked portion of a shoe; an upper moulds part slidable in a guideiprovidedi in a-icasin'g in:; which both mould parts are housed; and: .a-..heel-.i

support adapted to force a tackedeshoeabetweenr:

the two mould parts;

4. An apparatus :for dressing-Lrthe edgesofthez: upper leather in the manufacture of shoes-,:.com:-. prising a fixed lower mould :part adapted. to: ens-- gage th'e tacked portion of i'the shoe; a; slidable'z; upper mould part', aiheel support adapted to force: a tacked shoe-lraetweenv the .twoxmouldxparts; and f grooves provided in'rthe cavi-ty of the fixed lowers. mould part andidirectedtowards the axis;of.the:"=' last and mould to impart afinal stretchingstmthed 5. Anapparatus for dressingithe edgesx'of the: upper leather inithe manufacture a of rshoes; com prising a fixedrlower zmoul'dzparuta slidable upper:

k mould: vp-ar.t;:. a heel .1 support adapted to force -a.

tacked'shoe between. the two mould partstglioovese provided: .in the "cavity of'zthe .fixed lower mould; part anddirectedtowards thez=axis ofs-the last? and. mould. to: impart a {final stretching? to athes pressed: material, and a: heating devicelin .that part of the mould-which enga es the tackededge 1 of the upper;

6. An-apparatus for dressingthe edges ofithefi. upperv leather in-the manufacture of shoes-,- com--- prising ta-fixed lower mould part, aslidable upper mould part; a heel. support adapted to force- .-atacked shoebetween the two mould .aparts and mounted onap-ivoted: lever, grooves provided in"; thes-cavity of the fixedv lower-mould -parttand.

- directed towards the axis. oftthelastiand mould.

to impart a final stretching to the pressed material, and a heating device in that part of the mould which engages the tacked edge of the upper.

7. An apparatus as set forth in claim 6, wherein the heel support is controlled by a hand lever through the intermediary of a lever system.

8. An apparatus for dressing the edges of the upper leather in the manufacture of shoes, comprising a fixed lower mould part, a slidable upper mould part, a heel support adapted to force a tacked shoe between the two mould parts, grooves provided in the cavity of the fixed lower mould part and directed towards the axis of the last and mould to impart a final stretching to the pressed material, and a heating device in that part of the mould which engages with the tacked edge of the upper, the slidable upper mould part being forced into operative position by the heel support through the imtermediary of the shoe carried on the latter.

An apparatus for dressing the edges of the upper leather in the manufacture of shoes, comprising a fixed lower mould part, a slidable upper mould part, a heel support adapted to form a tacked shoe between the two mould parts and mounted on a pivoted lever, grooves provided in the cavity of the fixed lower mould part and directed towards the axis of the last and mould to impart a final stretching to the pressed material, and a heating device in that part of the mould which engages with the tacked edge of the upper, the slidable upper mould part being forced into operative position by the heel support through the intermediary of the shoe carried on the latter, the return movement Of the upper mould part from its operative position being controlled by a link system.

BA'rA, VIKTOR. viTEK, ADOLF.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,714,560 Hume May 28, 1929 1,767,106 Winkler et al June 24, 1930 2,104,228 Kamborian Jan. 4, 1938 2,235,887 Kamborian Mar. 25, 1941 

